If the activities are linke "finish - start" then a delay on the 1st activity in the chain will affect all of them equally.
It would be as if they were acting as one single activity.
The last activity in the chain would drive the delay on the critical path but the delay period is the Planned Start Date of the 1st activity and the Actual start date of 1st Activity.
I said before that the delay period may be longer than the extended period because float is being absorbed.
It may of course be shorter if the delay pushes activities into a holiday or bad weather period.
The time for extra costs is the extended period - the rate for extra costs is that applying to the delay period.
If there are different cost bands within the delay period then you may apply an average or ascertain the "centre of gravity" of the cost band histogramme over the delay period.
I hope this clarifies things.
Best regards
Mike Testro
Member for
19 years 9 months
Member for19 years9 months
Submitted by khawaja uddin on Wed, 2008-07-30 03:28
"You must now find which of the activities was the 1st and the last to affect the critical path.."
As per your reply line 2
"If they are linked then the time of delay would be the planned start date of the 1st activity in the chain and the delayed start."...thn what is the significance of last activity..??
more impportantly ,"time of delay" is measured between ES to delayed start and not just the -ve float..??
normally the event effect is impacted in the Base line program ..as Impacted As Planned -program which evntually doesnt show any concurent delay (unless compared with any updated program in any particular point in time).
In our case the event has effected upon porgress of many Electro-mechanicl activities but in fact time opf delay is different on each activities,....how to decide for Time of Delay in this scenario ????/
The time of delay is the period from when the delayed activity should have started to when it actually did start.
This may be longer than the delay on completion because of float loss.
If the delay is caused by a relevant event and there are no concurrent contractor culpable delays then the costs are calculated by the extended period using the costs in the delay period.
Member for
19 years 10 monthsRE: Time of Delay
Hi Khawaja
If the activities are linke "finish - start" then a delay on the 1st activity in the chain will affect all of them equally.
It would be as if they were acting as one single activity.
The last activity in the chain would drive the delay on the critical path but the delay period is the Planned Start Date of the 1st activity and the Actual start date of 1st Activity.
I said before that the delay period may be longer than the extended period because float is being absorbed.
It may of course be shorter if the delay pushes activities into a holiday or bad weather period.
The time for extra costs is the extended period - the rate for extra costs is that applying to the delay period.
If there are different cost bands within the delay period then you may apply an average or ascertain the "centre of gravity" of the cost band histogramme over the delay period.
I hope this clarifies things.
Best regards
Mike Testro
Member for
19 years 9 monthsRE: Time of Delay
Thanks Mike,
I am referring to one of your statement
"You must now find which of the activities was the 1st and the last to affect the critical path.."
As per your reply line 2
"If they are linked then the time of delay would be the planned start date of the 1st activity in the chain and the delayed start."...thn what is the significance of last activity..??
more impportantly ,"time of delay" is measured between ES to delayed start and not just the -ve float..??
Your guidance will be of great value ..
Rgds
Member for
19 years 10 monthsRE: Time of Delay
Hi Khawaja
Are many electro-mechanical activites linked together or are they separate stand alone activities with a different route on the critical path?
If they are linked then the time of delay would be the planned start date of the 1st activity in the chain and the delayed start.
If they are separate then the event must be linked to all of them and the project rescheduled.
You must now find which of the activities was the 1st and the last to affect the critical path.
Let me know if that is your case & I will guide you through the process.
Best regards
Mike Testro
Member for
19 years 9 monthsRE: Time of Delay
thanks ,Once again
normally the event effect is impacted in the Base line program ..as Impacted As Planned -program which evntually doesnt show any concurent delay (unless compared with any updated program in any particular point in time).
In our case the event has effected upon porgress of many Electro-mechanicl activities but in fact time opf delay is different on each activities,....how to decide for Time of Delay in this scenario ????/
Member for
19 years 10 monthsRE: Time of Delay
Hi Khawaja
The time of delay is the period from when the delayed activity should have started to when it actually did start.
This may be longer than the delay on completion because of float loss.
If the delay is caused by a relevant event and there are no concurrent contractor culpable delays then the costs are calculated by the extended period using the costs in the delay period.
Best regards
Mike Testro